/Engine/Plugins/Runtime/MassEntity/Source/MassEntity/Public/MassProcessingPhaseManager.h
Retrieves OnPhaseStart multicast delegate's reference for a given Phase
[FMassProcessingPhase::FOnPhaseEvent](API\Plugins\MassEntity\FMassProcessingPhase\FOnPhaseEvent) & GetOnPhaseStart ( const [EMassProcessingPhase](API\Plugins\MassEntity\EMassProcessingPhase) Phase )